Service Worker: Add metrics and timeout for starting a Service Worker.

content/browser/service_worker/embedded_worker_instance.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 35 matching lines @@
 class CONTENT_EXPORT EmbeddedWorkerInstance {
  public:
   typedef base::Callback<void(ServiceWorkerStatusCode)> StatusCallback;
   enum Status {
     STOPPED,
     STARTING,
     RUNNING,
     STOPPING,
   };
 
+  // This enum is used in UMA histograms, so don't change the order or remove
+  // entries.
+  enum StartingPhase {
+    NOT_STARTING,
+    ALLOCATING_PROCESS,
+    REGISTERING_TO_DEVTOOLS,
+    SENT_START_WORKER,
+    SCRIPT_DOWNLOADING,
+    SCRIPT_LOADED,
+    SCRIPT_EVALUATED,
+    STARTING_PHASE_MAX_VALUE,
+  };
+
   class Listener {
    public:
     virtual ~Listener() {}
     virtual void OnScriptLoaded() {}
     virtual void OnStarted() {}
     virtual void OnStopped(Status old_status) {}
     virtual void OnPausedAfterDownload() {}
     virtual void OnReportException(const base::string16& error_message,
                                    int line_number,
                                    int column_number,
@@ skipping 33 matching lines @@
 
   // Sends |message| to the embedded worker running in the child process.
   // It is invalid to call this while the worker is not in STARTING or RUNNING
   // status.
   ServiceWorkerStatusCode SendMessage(const IPC::Message& message);
 
   void ResumeAfterDownload();
 
   int embedded_worker_id() const { return embedded_worker_id_; }
   Status status() const { return status_; }
+  StartingPhase starting_phase() const {
+    DCHECK_EQ(STARTING, status());
+    return starting_phase_;
+  }
   int process_id() const { return process_id_; }
   int thread_id() const { return thread_id_; }
   int worker_devtools_agent_route_id() const;
   MessagePortMessageFilter* message_port_message_filter() const;
 
   void AddListener(Listener* listener);
   void RemoveListener(Listener* listener);
 
   void set_devtools_attached(bool attached) { devtools_attached_ = attached; }
+  bool devtools_attached() const { return devtools_attached_; }
 
   // Called when the script load request accessed the network.
   void OnNetworkAccessedForScriptLoad();
 
+  static std::string StatusToString(Status status);
+  static std::string StartingPhaseToString(StartingPhase phase);
+
  private:
   typedef ObserverList<Listener> ListenerList;
   class DevToolsProxy;
   friend class EmbeddedWorkerRegistry;
   FRIEND_TEST_ALL_PREFIXES(EmbeddedWorkerInstanceTest, StartAndStop);
 
   // Constructor is called via EmbeddedWorkerRegistry::CreateWorker().
   // This instance holds a ref of |registry|.
   EmbeddedWorkerInstance(base::WeakPtr<ServiceWorkerContextCore> context,
                          int embedded_worker_id);
@@ skipping 63 matching lines @@
   void OnReportConsoleMessage(int source_identifier,
                               int message_level,
                               const base::string16& message,
                               int line_number,
                               const GURL& source_url);
 
   base::WeakPtr<ServiceWorkerContextCore> context_;
   scoped_refptr<EmbeddedWorkerRegistry> registry_;
   const int embedded_worker_id_;
   Status status_;
+  StartingPhase starting_phase_;
 
   // Current running information. -1 indicates the worker is not running.
   int process_id_;
   int thread_id_;
 
   // Whether devtools is attached or not.
   bool devtools_attached_;
 
   // True if the script load request accessed the network. If the script was
   // served from HTTPCache or ServiceWorkerDatabase this value is false.
   bool network_accessed_for_script_;
 
   StatusCallback start_callback_;
   ListenerList listener_list_;
   scoped_ptr<DevToolsProxy> devtools_proxy_;
 
   base::TimeTicks start_timing_;
 
   base::WeakPtrFactory<EmbeddedWorkerInstance> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerInstance);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_